NGUYEN Tuananh

Tokyo Polytechnic University, School of Architecture and Wind Engineering, Post-Doc

Follower

Following

Public Views

Address: Santa Clara, California, United States

less

Prof. Saeid Eslamian

Isfahan University of Technology

John Barry

Queen's University Belfast

David Seamon

Kansas State University

Armando Marques-Guedes

UNL - New University of Lisbon

SAURABH GUPTA

NIT RAIPUR

Umesh Unnikrishnan

Georgia Institute of Technology

Gary Feinman

Field Museum

Antonio Costa

Istituto Nazionale di Geofisica e Vulcanologia

Mikail F Lumentut

National Taiwan University

Oscar Herrera Granados

Wrocław University of Technology

InterestsView All (6)

Uploads

Papers by NGUYEN Tuananh

Characteristics of Lift Generated by Three Vortices Synchronizing with Cylinder Oscillation

日本機械学会年次大会講演論文集(CD-ROM), 2011

Influence of mass and damping ratios on VIVs of a cylinder with a downstream counterpart in cruciform arrangement

Journal of Fluids and Structures, 2012

Influence of mass and damping ratios on VIVs of a cylinder with a downstream counterpart in cruciform arrangement

Previous wind tunnel experiments by the present authors showed that two kinds of longitudinal vor... more Previous wind tunnel experiments by the present authors showed that two kinds of longitudinal vortex induce cross-flow vibrations (LVIVs) on a circular cylinder accompanied by the vortex-synchronization (lock-in) by setting another cylinder downstream with proper gaps in cruciform arrangement, like the well-known Karman vortex induced vibration (KVIV) of a single cylinder. In this work, experiments on the three types of VIVs are carried out using a water tunnel to investigate influences of the mass ratio M R and the damping ratio z on the oscillation response. It is shown that the two LVIVs, i.e. the trailing-and the necklace-VIVs, occur in water flow over respective ranges of flow velocity U in spite of large differences in values of M R and z as compared with experiments in air flow. However, their influences on oscillation responses of the two LVIVs are largely different from each other, and also from the KVIV. They are compared by referring to the de-synchronization prediction based on the dimensional analysis and the equation on cylinder motion. The variation of behaviors among the three types of VIV are attributed to the differences among the three vortices in their threshold functions for synchronization and the vortex-synchronization functions which express the feedback effect of the cylinder oscillation on the alternating lift generated by the vortex.

Download

Characteristics of Lift Generated by Three Vortices Synchronizing with Cylinder Oscillation

日本機械学会年次大会講演論文集(CD-ROM), 2011

Influence of mass and damping ratios on VIVs of a cylinder with a downstream counterpart in cruciform arrangement

Journal of Fluids and Structures, 2012

Influence of mass and damping ratios on VIVs of a cylinder with a downstream counterpart in cruciform arrangement

Download

NGUYEN Tuananh

Related Authors

Uploads

Papers by NGUYEN Tuananh

Log In